120642615656 has 8 divisors (see below), whose sum is σ = 226204904370. Its totient is φ = 60321307824.

The previous prime is 120642615641. The next prime is 120642615659. The reversal of 120642615656 is 656516246021.

It can be written as a sum of positive squares in only one way, i.e., 110113803556 + 10528812100 = 331834^2 + 102610^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (120642615659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7540163471 + ... + 7540163486.

Almost surely, 2^120642615656 is an apocalyptic number.

It is an amenable number.

120642615656 is a deficient number, since it is larger than the sum of its proper divisors (105562288714).

120642615656 is a wasteful number, since it uses less digits than its factorization.

120642615656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15080326963 (or 15080326959 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 44.

The spelling of 120642615656 in words is "one hundred twenty billion, six hundred forty-two million, six hundred fifteen thousand, six hundred fifty-six".